3y inflation

Price of the roll rise in the first year by 9%, the second year fell by 5% and in the third year increased by 3%.

Calculate the average annual increase in price of the roll.

p =  2.2 %

Step-by-step explanation:

$p=100\left(\sqrt[3]{\left(1+\frac{9}{100}\right)\cdot \left(1-\frac{5}{100}\right)\cdot \left(1+\frac{3}{100}\right)}-1\right)=2.2\mathrm{%}$

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